The underlying HLO pad already supports negative edge padding. We just removed
some checks preventing negative edge padding, and added a test.
PiperOrigin-RevId: 316672291
Change-Id: I38e55f86727d90f66aadb549a587b43df6588571
This intends to improve consistency -- the accessor used to fetch the constant
inputs of an op is called CompileTimeConstantInputs.
PiperOrigin-RevId: 217921096